186results about "Hot-water central heating" patented technology

The invention provides a compound evaporator coupled with multiple heat sources, and a heat pump system thereof. The use efficiency of a heat pump and the energy utilization rate are improved while the coupled use of the multiple heat sources is achieved; meanwhile, flue gas waste heat can be recycled, and purification is achieved; and the side of the evaporator is prevented from being frosted effectively. The compound evaporator comprises a shell, and flanges arranged at the two ends of the shell; the shell comprises an outer shell and an inner shell; a spiral refrigerant flow channel is arranged in a clearance between the outer shell and the inner shell; an inside cavity of the inner shell forms a coupled working medium flow channel, and the two ends of the inner shell are provided witha coupled working medium inlet and a coupled working medium outlet separately; the outer side of the outer shell is provided with a plurality of flue gas cooling fins, and a flue gas channel used forheat exchange is formed between the adjacent flue gas cooling fins; and the two ends of the outer shell are separately provided with a refrigerant inlet and a refrigerant outlet which communicate withthe refrigerant flow channel.

The application belongs to the technical field of heat supply equipment, and provides a regional heat supply mixing tank based on turbulence structure optimization, which comprises a first turbulence component and a second turbulence component arranged in a tank body along a water flow direction; the first turbulence component is located behind a low-temperature water inlet and behind a high-temperature water inlet, and is used for blocking the channel of cold water sticking to the bottom and actively inducing to the middle or upper part of the tank body; the second turbulence component is located in front of a medium-temperature water outlet, and is used for forcibly turning and cutting the mixed fluid about to flow out, so as to realize the thermal deviation homogenization of the mixed fluid. The mixing tank is used for hydraulic decoupling and heat mixing of a primary circuit and a secondary circuit of a heat network, and the internal turbulence structure is additionally arranged and optimized to eliminate the thermal stratification phenomenon in the tank, and then the temperature uniformity of the water outlet is improved.

This application provides a waste heat supply system for data centers, relating to the field of waste heat utilization technology, to address, to some extent, the energy waste caused by the direct discharge of waste heat from data centers. It mainly includes a data center, a heat exchange unit, supply lines, and heat-using units. The supply lines include a main water supply pipe, a main return water pipe, branch supply water pipes, and branch return water pipes. The heat exchange unit includes a cooler and a heat exchanger. The main return water pipe is connected to the cooler, the cooler's outlet is connected to the heat exchanger's first inlet, the data center's outlet is connected to the heat exchanger's second inlet, the heat exchanger's first outlet is connected to the main supply water pipe, and the heat exchanger's second outlet is connected to the data center's inlet. Branch supply water pipes are distributed on the main supply water pipe and are connected to both the main supply water pipe and the heat-using units' inlets. Branch return water pipes are distributed on the main return water pipe and are connected to both the main return water pipe and the heat-using units' return ends.

The invention relates to a compact heat pump (12) for installation in a building room (50) of a building (54), comprising a heat pump (14) for generating thermal energy for heating / cooling, an integrated space heat exchanger (16) for transferring at least a portion of the generated thermal energy directly to the building room (50), and an integrated heat distribution unit (28) comprising at least one supply line (30) and at least one return line (32) for transferring a further portion of the thermal energy generated by the heat pump (14) to a further space heat exchanger (38) located remotely from the compact heat pump (12) and hydraulically connectable to at least the supply line (30) and the return line (32) of the heat distribution unit (28). The invention further relates to a building air conditioning system (10) with such a compact heat pump (12).

The utility model is suitable for circulating water utilization technical field provides utilizes electric arc furnace cooling circulating water automatic temperature regulation heat supply system, including circulating water pool, electric arc furnace, first water pump, floor heating pipeline and two second water pumps, be provided with first circulation pipeline between circulating water pool and the cooling system of electric arc furnace, first water pump is established in the input pipeline of first circulation pipeline, be provided with a plurality of V type heat pipe in circulating water pool, be provided with second circulation pipeline between a plurality of V type heat pipe and floor heating pipeline, two second water pumps are established in the input pipeline of second circulation pipeline, the output pipeline of second circulation pipeline is close to the side that circulating water pool set up first temperature sensor, be provided with refrigerator in circulating water pool, there is second temperature sensor on circulating water pool, the utility model utilizes electric arc furnace cooling water's heat to heating in the floor heating pipeline of heating water, thereby can save electric power cost, really achieve energy saving and emission reduction, green production.

The present application relates to the technical field of heat pump system, and particularly provides a control method of heat pump water machine system and the heat pump water machine system, aiming at solving the problem that the outdoor fan speed and system load are not matched during the lag period from the change of water inlet temperature to the change of coil temperature of the heat pump water machine system, and the system energy efficiency ratio is low. For this purpose, the control method of the heat pump water machine system comprises the following steps: calculating the target coil temperature according to the operation mode, compressor frequency, water inlet temperature and coil temperature of the heat pump water machine system; adjusting the speed of the outdoor fan according to the operation mode and the target coil temperature. The present application takes the water inlet temperature as the parameter for calculating the target coil temperature, adjusts the speed of the outdoor fan according to the target coil temperature, can predict the load trend of the system before the load demand of the system changes but the coil temperature does not change obviously, and adjusts the speed of the outdoor fan in advance, so that the speed and the load are matched, and the energy efficiency ratio of the heat pump water machine system is improved.

The present application relates to a system (100) for producing domestic hot water and heat for central heating, the system (100) comprising: a heat generator (1) for obtaining heat from a heat source, the heat generator (1) having a generator outlet port (1.1) and a generator return port (1.2); a central heating circuit (3) having a heating supply port (3.1) and a heating return port (3.2); a tank (11) having a top and a bottom, the tank (11) containing a thermal storage medium (12); a first tapping coil (7) immersed in the thermal storage medium (12) in the bottom of the tank (11); a second tapping coil (6) immersed in the thermal storage medium (12) in the top of the tank (11); and means (8, 9, 13, 14) for warming domestic hot water; wherein the heat generator (1), the second tapping coil (6), the central heating circuit (3) and the first tapping coil (7) are fluidly connected in series so as to allow fluid to flow from the heat generator (1) back to the heat generator (1) via at least one of the second tapping coil (6), the central heating circuit (3) and the first tapping coil(7); the system (100) further comprising: a first three-way valve (2) fluidly connected to the generator outlet port (1.1), the second tapping coil (6) and the heating supply port (3.1), and configured to selectively bypass or flow fluid through the second tapping coil (6); a second three-way valve (4) fluidly connected to the heating supply port (3.1) and the heating return port (3.2), and configured to selectively bypass or flow fluid through the central heating circuit (3); and a third three-way valve (5) fluidly connected to the first tapping coil (7) and the generator return port (1.2), and configured to selectively bypass or flow fluid through the first tapping coil (7).

The invention relates to the technical field of central heating and industrial heat energy utilization, in particular to a mixed water heat exchanger control system and a control method thereof.The mixed water heat exchanger control system comprises a jet type mixed water heat exchanger, a first high-temperature water jet channel, a second low-temperature water jet channel and a mixing cavity are formed in the jet type mixed water heat exchanger; the primary net adjusting unit comprises an electric adjusting valve and a pressure sensor which are arranged at a primary high-temperature water inlet; the secondary network circulating unit comprises a circulating pump, a flow sensor and a return water temperature sensor; the temperature detection unit at least comprises a mixed outlet water temperature sensor; the controller is in signal connection with the electric adjusting valve, the circulating pump and the sensors; synchronous efficient utilization of primary network heat energy and pressure energy is achieved, the heat exchange efficiency can be close to 100%, secondary low-temperature water can be effectively driven by the pressure energy of primary high-temperature water to participate in mixing through the injection pressurization characteristic of the injection type water mixing heat exchanger, and the operation power of a secondary network circulating pump is reduced.

This application belongs to the field of auxiliary heating and discloses an auxiliary heating system based on a PVT system, including a PVT system, a heat pump unit module, a secondary centralized heating network, and connected PVT power management module, secondary network heat supply module, and collaborative control module. The PVT power management module processes the electrical energy of the PVT system and supplies power to the heat pump; the secondary network heat supply module transfers the heat energy generated by the PVT and heat pump to the secondary network; the collaborative control module determines the operating strategy based on the real-time heat load of the secondary network and controls each module. This solution achieves dual utilization of PVT electrical and thermal energy, improves the comprehensive utilization rate of new energy to over 85%, dynamically adjusts the operating strategy to minimize the heating demand of the power plant, and ensures heating stability, thus achieving both energy saving and emission reduction benefits.

The application provides a kind of mixed heating system's regulation and control method, it is related to heating technical field.The mixed heating system's regulation and control method includes: obtaining target area and mixed heating system's heat supply related data, and the weight setting of the energy consumption amount, CO2 emission amount and operating cost of target area three;Based on heat supply related data, construct mixed heating system about intermediate outlet water temperature energy consumption amount model, CO2 emission amount model and operating cost model;Based on energy consumption amount model, CO2 emission amount model and operating cost model, and weight setting, construct about intermediate outlet water temperature comprehensive evaluation index function;Calculate the intermediate outlet water temperature when comprehensive evaluation index function obtains minimum, and it is as optimal intermediate temperature;According to optimal intermediate temperature and heat supply related data, regulate the operating state of heat pump and boiler.The regulation and control method makes the applicability of mixed heating system to heat source regulation and control higher, and the regulation and control perfection is higher.

climate system (1), at least exhibiting: - a heating circuit (2) with a mixed heating circuit (8) and an unmixed heating circuit (5), - a heat generator (11) which is connected to a heating circuit supply (3) and a heating circuit return (4) of the heating circuit (2), wherein a first return (7) of the unmixed heating circuit (5) is directly connected to the heating circuit return (4) of the heating circuit (2), - a three-way valve (15) arranged at a first branch (14) of the heating circuit flow (3), - a first circulation pump (12) which is located upstream of the three-way valve (15) in a flow direction (25) of the heating circuit (2), - a second branch (16) which is downstream of the first branch (14) in the flow direction (25), which connects the heating circuit supply (3) with a second supply (9) of the mixed heating circuit (8) and which connects a second return (10) of the mixed heating circuit (8) with the second supply (9) of the mixed heating circuit (8), and - a second circulation pump (13) arranged in the mixed heating circuit (8). In addition, a method for operating the climate control system (1) and a computer program product (18) are proposed.

A smart heating system (10) for detecting leaks comprising a boiler (12), a plurality of radiators (14a, 14b, 14c, 14d), and a water circulation system (16). A valve is at or adjacent to the inlet and / or outlet of each radiator (14a, 14b, 14c, 14d) and an electronic pressure gauge is at each radiator (14a, 14b, 14c, 14d) configured to measure a water pressure in the radiator (14a, 14b, 14c, 14d) and / or water circulation system (16) adjacent to the radiator (14a, 14b, 14c, 14d) to generate a pressure reading. Each electronic pressure gauge has an identifier. A user electronic device (20) with a user display is communicatively connected with the electronic pressure gauges so as to be configured to receive and display the pressure readings and identifiers.

The present invention relates to a system for producing hot water on a livestock farm, comprising a thermodynamic water heater (2) including a water-to-water heat pump (4) connected to at least one return circuit (5, 6) having (a) at least one comfort mat (5) including several fluid-tight cavities (77) intended to contain a heat transfer fluid, the fluid-tight cavities (77) being located at least partially below at least one containment zone (71), and (b) circulation means (8, 51) for circulating the heat transfer fluid in the return circuit (5, 6) through the at least one comfort mat (7). [Selected Figure] Figure 1

The utility model discloses a floor heating and domestic hot water combined heat pump system, comprising: refrigerant circulation loop: compressor, first air side heat exchanger, four -way valve, second air side heat exchanger and intermediate heat exchanger form, intermediate heat exchanger includes: first heat exchange pipe part and second heat exchange pipe part, water circulation loop: floor heating, first heat exchange pipe part, second heat exchange pipe part, water pump and water tank heat exchanger constitute, first heat exchange pipe part is connected with floor heating, second heat exchange pipe part is connected with first heat exchange pipe part, water tank heat exchanger and floor heating, first control valve controls first heat exchange pipe part and floor heating or water tank heat exchanger intercommunication, when system is in floor heating water tank linkage operation mode, first heat exchange pipe part, second heat exchange pipe part, first control valve and water tank heat exchanger form domestic hot water circulation loop, and floor heating, second heat exchange pipe part form first floor heating water circulation loop, the heat pump system of the utility model sets up one intermediate heat exchanger and can realize the simultaneous supply of floor heating and domestic hot water.

The invention relates to a heating body (10) comprising a plurality of heat pipes (14) filled with a working medium (12), which preferably run parallel or substantially parallel, each having a first end (20) and a second end (22), and a heat source (16) which is thermally coupled to the first end (20) and / or the second end (22) of the heat pipes (14). In order to improve the efficiency, to shorten the heating time and to achieve a uniform heat distribution, it is provided that the first end (20) of the heat pipes (14) is configured open and is in fluid connection with a first cross connection (24), and / or the second end (22) of the heat pipes (14) is configured open and is in fluid connection with a second cross connection (26), wherein the heat pipes (14) and the cross connections (24, 26) form a common cavity which is filled with the working medium (12), and the first cross connection (24) or the second cross connection (26) is thermally coupled to the heat source (16) in order to absorb heat from the heat source (16).

The application provides a container type water-cooled data center and a control method, and belongs to the technical field of temperature control. The container type water-cooled data center comprises a computing power service cabinet system, a pump station control system, a plate unit and a power distribution cabinet unit arranged in a container, and further comprises an external liquid cooling system. The computing power service cabinet system comprises a plurality of independently operated modules, each module comprises a plurality of server cabinets, each server cabinet corresponds to a power distribution branch, the plurality of power distribution branches in the same module are collected into the same power distribution bus, the plurality of power distribution buses in the plurality of modules are collected into the same power distribution bus, and the power distribution bus is provided with a current switch for controlling the power distribution bus. The liquid cooling system cools and dissipates heat for the computing power service cabinet system through circulation of a medium. The plate unit serves as a bypass branch of the liquid cooling system and undertakes the heat exchange function of the liquid cooling system in part or in whole. The pump station control system provides power for the circulation of the medium. The application has high integration, small space occupation, high density in unit space, and is safe and reliable.

The utility model discloses a multifunctional heat exchange unit, including primary network water supply system, primary network backwater system, secondary network water supply system, secondary network backwater system, with the water supplementing system and plate heat exchanger of secondary network backwater system intercommunication, be equipped with circulating pump in the secondary network backwater system, be equipped with water supplementing pump in the water supplementing system, be equipped with electric heater on primary network water supply system, solar panel is connected to electric heater, be equipped with digital locking balance valve on secondary network water supply system, primary network water supply system with the secondary network backwater system all are equipped with Y type filter and permanent -magnetic descaler. When the heat source temperature does not reach the effect, can use solar panel electric heater to heat temperature and promote to reach the specified value before entering the heat exchanger. Can accurately adjust pressure drop and flow in the water supply, can effectively protect important components service life reduction harmful ingredient in water, differential pressure steady reduces noise.

The application provides a large-temperature-difference energy storage heating system and a heating method based on solar full-spectrum utilization, and belongs to the field of solar heating. In order to solve the problems of low solar energy utilization rate, small temperature difference of heat storage medium, less energy storage and resource waste, and difficulty in guaranteeing heating due to the instability and low energy flow density of solar energy, the application comprises a solar light concentration and frequency utilization photovoltaic power generation and heat collection system, a large-temperature-difference energy storage subsystem and a compression-ejection coupled heat pump subsystem. The solar light concentration and frequency utilization photovoltaic power generation and heat collection subsystem generates electric energy and heats the circulating medium in the heat collection pipe, and stores the surplus electric energy. The large-temperature-difference energy storage subsystem utilizes the heat of the heat conduction medium in stages, including secondary heating and tertiary heating. The temperature difference of the heat conduction medium can be greatly enlarged, and the energy storage density is improved. The high-temperature section drives the ejection heat pump, the medium-temperature section directly exchanges heat, and the low-temperature section realizes photovoltaic power storage heat pump combined heating, so that the heating guarantee is improved.

Claim (main claim) Heating circuit supply plate (combined) for a dry construction underfloor heating system for receiving a heating pipe by pressing it into milled grooves (press fit), comprising: a) an edge zone with at least two parallel longitudinal millings (LF), b) at least one supply milling groove (A) leading into the heating circuit area in the interior of the room and at least one return milling groove (A) leading into the heating circuit area in the interior of the room, c) several arc-shaped transition millings (B) which connect the longitudinal millings (LF) with the supply millings (A), wherein the arc-shaped transition millings (B) are arranged in offset positions, so that a supply from an edge zone can be introduced stepwise into the heating circuit area and a return from the heating circuit area can be routed back into the edge zone, without pipe crossing and without manual re-milling of groove sections on site.Where at least one flow feed milling (A) can be transferred via several offset arc-shaped transition millings (B) into each of the parallel longitudinal millings (LF) in order to freely adapt the connection position of the flow to different heating circuit positions.

A heat pump is provided. The heat pump includes an outdoor unit including a heat exchanger and provided to heat heating water by the heat exchanger, and a distribution unit connected to the outdoor unit by a water pipe and provided to receive the heating water and distribute the received heating water to a heating unit, wherein the distribution unit includes a cabinet in which a mechanical chamber is formed, a first cover installed at an upper portion of the cabinet and including a cover portion covering a portion of the mechanical chamber, and a second cover connected to the water pipe and having a second cover body covering another portion of the mechanical chamber, the second cover being connected to the first cover such that the second cover body is disposed below the cover portion.

The present application relates to the technical field of intelligent control, and discloses a power plant low bypass steam direct heating network circulating water dynamic shunting system, comprising: a data acquisition module, which is used for collecting power plant operation parameters and heating network demand parameters in real time; a model solving module, which is used for inputting the collected parameters into a preset multi-objective optimization model, and obtaining an optimal steam shunting ratio through online calculation of the model; an instruction generation module, which is used for converting the optimal steam shunting ratio into real-time control instructions for a shunting regulating valve group; an execution adjusting module, which is used for adjusting the shunting regulating valve group according to the control instructions, dynamically changing the flow of low bypass steam injected into the heating network circulating water, and discharging the remaining steam according to the original bypass system; and a safety monitoring module, which is used for independently monitoring key safety parameters, and when a safety threshold is exceeded, interrupting the main control process and executing a preset highest priority safety interlocking action. Under the premise of guaranteeing the heating quality of the heating network, the economic benefits of low-grade waste heat recovery are maximized.

This invention discloses a novel microwave-foamed underfloor heating board, belonging to the fields of building insulation, underfloor heating systems, and fireproofing and heat insulation technology. The board consists of an inorganic silica gel closed-cell foam insulation core board, a metal steel plate layer composited on one side of the core board, and a composite layer of waterproof mortar and alkali-resistant mesh fabric composited on the other side of the core board. Underfloor heating pipe installation grooves are formed on the surface of the metal steel plate layer, with a groove spacing of 20 cm. The core board uses inorganic silica such as quartz sand, river sand, and various slags as the silicon source, and is manufactured through sol modification, gelation, microwave foaming, and infrared curing. It has a closed-cell porous structure, providing excellent sound absorption. The metal steel plate conducts heat rapidly and simultaneously forms a double sound insulation structure with the waterproof mortar composite layer, achieving integrated sound absorption and insulation. This invention, made entirely of inorganic materials, meets the A1 fire resistance standard and combines the advantages of insulation, waterproofing, high strength, convenient construction, and environmental friendliness. Its overall performance is superior to traditional materials such as rock wool and glass wool. Suitable for densely populated places such as schools, hospitals, airports, stadiums, and commercial centers, as well as for fireproofing, heat insulation, and noise reduction of airplanes, subways, high-speed trains, and ships.

This invention discloses a carbon dioxide-based data center cooling system, belonging to the field of data center thermal management technology. The system includes a cooling device, at least one storage tank, a coolant distribution unit, an inlet manifold, and an outlet manifold. The cryogenic liquid carbon dioxide produced by the cooling device is stored in the storage tank and transported to server racks within the data center via the distribution unit and pipelines to cool high-power AI chips. The cooled working fluid returns to the cooling device for recycling. The system provides two cooling implementation methods: one is direct cooling of the chips with liquid carbon dioxide; the other is indirect cooling through an independent carbon dioxide circulation loop formed by an intermediate heat exchanger. Furthermore, the system integrates a waste heat recovery unit, which can use the compression heat generated by the cooling device for power generation or district heating. This invention utilizes carbon dioxide as the working fluid to achieve efficient cooling and comprehensive energy utilization for data centers, offering advantages such as high energy efficiency and environmental friendliness.

An expansion tank system includes a tank, a membrane, and a monitoring system. The monitoring system monitors an amount of gas within the tank to determine a change in the amount of gas within the tank during use of the expansion tank system and outputs an instruction associated with a corrected amount of gas so that the instruction can be used for alignment of the amount of gas within the tank to the corrected amount of gas to minimize stress on the membrane thereby minimizing the risk of failure or degradation of the membrane.

The present invention relates to a method for controlling a heating and / or cooling system (1) for a building, comprising a temperature control element (10) that heats or cools a temperature control medium, optionally a circulation pump (16), several heat exchangers (5, 5', 5'', 5'') connected to the temperature control element (10) and optionally to the circulation pump (16), wherein each heat exchanger (5, 5', 5'', 5'') is assigned to a room of the building and each heat exchanger (5, 5', 5'', 5'') has a valve (6, 6', 6'', 6'') that regulates the flow of the temperature control medium through the heat exchanger (5, 5', 5'', 5'') with a valve (6, 6', 6'', 6'''') associated actuator for varying the opening degree of the corresponding valve (6, 6', 6'', 6''''), a flow pipe, a flow temperature sensor (3) arranged in the flow pipe, a consumer, a return pipe and a heating circuit temperature sensor (7, 7', 7'', 7'''') arranged in the return pipe, and at least one control unit (11),the power supply of the actuators of the valves (6, 6', 6'', 6'') is controlled, wherein in the heating and / or cooling system (1) the temperature control medium is heated or cooled in the temperature control element (10), is led via a supply line (2) to a supply heating circuit distributor (4), is distributed by the supply heating circuit distributor (4) to the heat exchangers (5, 5', 5'', 5''), flows through the heating circuits (5, 5', 5'', 5'') and is led via a return heating circuit distributor (8) into a return line (9) and via the return line (9) to the temperature control element (10), wherein several setpoint values ​​for the temperature difference of the temperature control medium in the supply and in the return are set in the respective actuator Return flow of the respective heat exchanger (5, 5', 5'', 5'') are stored,wherein a change in the setpoint for the respective actuator is effected by a clocked sequence of switching the power supply to the corresponding actuator on and off by the control unit (11). Furthermore, the present invention relates to a heating system (1) for a building, the control unit (11) of which is configured to provide the operations for carrying out a method according to the invention, and to a computer program product, the execution of which in the control unit (11) is configured to provide the operations for carrying out a method according to the invention.

A heat transfer device, such as a heat exchanger, has dimensions and flow speed such that Reynolds number for the flow is in a range from 1 to 1000. The device uses a working fluid which is in a state of elastic turbulence. This enhances transfer of heat to or from the working fluid. In some embodiments the fluid is an emulsion with a disperse phase which changes between liquid and solid so that its latent heat of fusion contributes to the amount of heat carried by the working fluid.

The application discloses a supplementary combustion type large-temperature-difference heat exchange unit and relates to the technical field of heat supply equipment. The supplementary combustion unit comprises a supplementary combustion generator, a first generator, a first condenser, a first low-pressure absorber, a first low-pressure evaporator, a first high-pressure absorber and a first high-pressure evaporator. A primary network water inlet is connected in communication with a primary network water outlet in sequence through the first generator, the large-temperature-difference heat exchange unit, the first high-pressure evaporator and the first low-pressure evaporator. Secondary network water branch pipes are connected in communication with a secondary network water outlet through the first condenser after passing through the first low-pressure absorber and the first high-pressure absorber. In the application, the supplementary combustion unit can still work together with the large-temperature-difference heat exchange unit to convert the temperature of the primary network water into the secondary network water even when the combustion part in the supplementary combustion generator is not used, the utilization rate of the equipment can be improved, and the heat exchange effect can be improved.

A system and method for in ground heat exchange, including at least one first array and one second array, each first and second array comprising a plurality of capped pipes; at least one temperature sensor; and at least one flow rate sensor, a plurality of flow rate valves connected to each first array and second array, the flow rate valves configured to facilitate flow of a liquid through the system; at least one pump attached to the flow rate valves for modulating the flow rate of the system; and a heat pump, wherein the system is configured to provide heating and cooling to a building.

The invention relates to a distribution plate device for a heat pump comprising a heat pump having a first cold water inlet, a second heating return inlet, a first hot water outlet, and a second outlet supplying a heater; notable in that it comprises: - a first cold water supply circuit (21) extending between a cold water inlet and the first cold water inlet of the heat pump; - a second hot water circuit (22) extending between the first hot water outlet and a hot water manifold (26); - a third circuit (23) extending between the second heating return inlet of the heat pump and a heating return manifold (27); - a fourth circuit (24) extending between the second outlet supplying a heater of the heat pump and a manifold supplying a heater (28); - a support plate (20) supporting the device. Figure for the abstract: Fig. 1

A water heater according to an aspect of the present disclosure comprises: a housing; a heating part which is housed inside the housing; an expansion tank which is housed inside the housing; a circulation path part which passes through the heating part; a branch path part which branches off from the circulation path part and is connected to the expansion tank; and a tank support part that supports the expansion tank in the housing. The tank support part has a first support positioned on a first side in a first direction orthogonal to the vertical direction relative to the expansion tank, and a second support positioned on a second side in the first direction relative to the expansion tank. The first support has a first support surface for supporting the expansion tank from the lower side. The second support has a second support surface for supporting the expansion tank from the upper side.